Just had the pleasure of eating and drinking at Tommy's Joynt in SF, a "Hofbrau" style bar with a deli separate from the bar in terms of service and payment (food is served cafeteria style, you wait in line and pay cash only, waiters have nothing to do with that part of the place). The lamb shank and the pastrami were both top-notch.
Is there a place like this in DC-Balto? I can't think of one, though I don't have a real handle on Balto
pix of Tommy's